Sawmill-carriage scraper.



A. RBITZ. SAWMILL CARRIAGE SGRAPER.

APPLICATION FILED DEG. 29, 1909.

0 T fi um r m m 0 m w fl W m My W2 9 5 A. REITZ. SAWMILL CARRIAGESCRAPER.

APBLIOATION FILED D120. 29, 1909.

Patented July 19, 1910.

w s I N QMQMM 5 g. J I arm:

UNITED STATES PATENT OFFICE.

ALEXANDER REITZ, OF BOND, MARYLAND.

SAWMILL-CARRIAGE SCRAIPER.

To all whom it may concern:

Be it known that I, ALEXANDER REITZ, a citizen of the United States,residing at Bond, in the county of Garrett and State of Maryland, haveinvented new and useful Improvements in Sawmill-Carriage Scrapers, ofwhich the following is a specification.

The present invention provides means for keeping the track and thewheels of saw mill carriages free from sawdust and other obstructingmatter, so that the carriage may run freely and smoothly withoutimparting any jar which may result in serious injury to the saw or inthrowing the work out of true.

The invention is particularly designed for saw .mill carriages uponwhich logs are placed either to be dressed or to be cut into slabs orboards, the invention consisting of a scraper mounted independently ofthe framework of the carriage and adapted to clean both the track andthe wheels.

The invention contemplates a scraper which may be readily placed inposition and which in operation will be effective and automatic inadapting itself to compensate for wear, thereby insuring a scraping bothof the track and the wheels of the carriage no matter what may be theshape of the track or the wheels mounted thereon.

The invention consists of the novel features, details of constructionand combination of parts, which hereinafter will be more particularlyset forth, illustrated in the accompanying drawings, and pointed out inthe a pended claim.

Re erring to the drawings, forming a part of the specification, Figure 1is a perspective view of a portion of a track and a saw mill carriageequipped with a scraper embodying the invention. Fig. 2 is a sideelevation of the scraper, showing it applied to a pair of wheels of asaw mill carriage. Fig. 3 is a horizontal section on the line 33 of Fig.2. Fig. 4 is a vertical longitudinal section of a modification,illustrating the form of scraper adapted for a single wheel.

Corresponding and like parts are referred to in the followingdescription, and indicated in all the views of the drawings, by the samereference characters.

The framework of the saw mill carriage is indicated at 1 and 2designates the rails of the track. The supporting wheels of the carriageare indicated at 3.

The scraper consists of a series of blocks Specification of LettersPatent.

Application filed December 29, 1909.

Serial No. 535,508.

connected by bars, the latter being arranged upon opposite sides of thewheels 3 so as to prevent lateral displacement of the scraper. Theblocks correspond in thickness to the width of the wheels 3 so that theconnecting bars may extend along, opposite sides of the wheels and touchthe same lightly, thereby preventing lateral displacement of the scraperand yet admitting of the wheels 3 turning freely. The edges of theblocks facing the treads of the wheels conform to said treads bothcircumferentially and transversely and the same is true of the loweredges of the blocks adjacent the heads of the rails, with the resultthat both the wheels 3 and track rails are kept clear of sawdust andother matter tending to cling or lie thereon. Where a series of wheelshave a single scraper constructed to cooperate therewith, as shown inFigs. 1 and 2, the intermediate block 4, has its opposite edgessimilarly formed to correspond with the outer edges of adjacent wheels,whereas the terminal blocks 5 have their inner edges made to conform tothe treads of the wheels and their outer edges inclined so as to providescraping edges or points 6. The scraping blocks preferably consist ofwood and the inclined edges of the terminal blocks 5 are reinforced bymeans of metal straps 'Z. The longitudinal bars 8 connecting the blocksin series are located upon opposite sides of said blocks in transversealinement and are secured to each other and to the blocks by bolts orfastenings 9 passing through registering openings formed in the severalparts. The connecting bars 8 are depressed or formed with notches 9 intheir upper edges opposite the hubs or journals of the wheels so as toclear the same.

Where the scraper is intended for use with a single wheel, asillustrated in Fig. 4, two blocks 5 only are provided and are connectedby means of bars 8 arranged upon opposite sides thereof and spaced apartto embrace opposite sides of the wheel 3, said bars being connected toeach other and to the blocks by bolts or fastenings 9. The outerinclined edges of the blocks 5 are reinforced'by strap irons 7 which aresecured thereto.

It is to be understood that the scraper is wholly independent of theframework 1 of the carriage and is prevented from lateral displacementby means of the connecting bars 8 and from vertical displacement byreason of the blocks resting upon the rails Patented July 19, 1910..

of the track and by reason of the bars 8 extending across the hubs orjournals of the wheels 3. Moreover, the edges of the blocks adjacent thetreads of the wheels are made concave to conform thereto and embraceparts of the treads of the wheels both above and below the center,thereby limiting the vertical movement of the scraper. The scraper isloose and free to adapt itself both to the tread of the rails and to thetread of the carriage wheels, the scraper being moved along the track bythe wheels engagmg with the several blocks thereof. When the carriagemoves in one direction the scraper is pushed along in the same directionby the wheels engaging the rear edges of the relatively forward blocksand upon the return travel of the carriage the scraper is moved rearwardby the wheels of the carriage engaging the adjacent edges of the blockspreviously in the rear. The treads of the wheels and rails are keptclean and free from obstructing matter by rubbing of the scraper blocksthereon. The scraper may be assembled and placed in position by fittingthe blocks between and upon opposite sides of the wheels, after whichthe connecting bars are placed in position upon opposite sides of theblocks and wheels and connected by passing the bolts or fastenings 9through openings formed in said connecting bars and blocks.

From the foregoing description, taken in connection with theaccompanying drawings, the advantages of the construction and of themethod of operation will be readily apparent to those skilled in the artto which the invention a-ppertains, and while I have described theprinciple of operation of the invention, together with the device whichI now consider to be the embodiment thereof, I desire to have itunderstood that the device shown is merely illustrative, and that suchchanges may be made when desired as are within the scope of the claimappended hereto.

Having thus described the invention what is claimed as new, is

The herein described scraper for the wheels of a saw mill carriage andfor the supporting track upon which said carriage is arranged to run,said scraper consisting of a series of wooden blocks arranged to comeupon opposite sides of the carriage supporting wheels and having theinner edges of adjacent blocks made to conform to the treads of thewheels, the outer edges of the outer blocks being oppositely inclined,reinforcing irons secured to the said inclined edges of the outerblocks, and connecting bars arranged upon opposite sides of the blocksand secured to each other and to the blocks, said connecting bars havingdepressions in their upper edges at points opposite the hubs or journalsof the carriage supporting wheels.

In testimony whereof I aflix my signature in presence of two witnesses.

ALEXANDER REITZ.

Witnesses:

ANNIE TREACY, J AMES P. TREACY.

